Finding the estimation of the total cost

Finding the estimation of the total cost

Tharun went to footwear shop with his father. A pair of footwear cost ₹ 99.50 in the price tag.

Note: If the paise is more than 50 or equal to 50 add 1 to the previous digit, if it is less than 50 keep the previous digit as it is.

 Tharun : Appa, what is the cost of the footwear?

Appa : ₹ 100

Tharun : Appa, the price tag shows ₹ 99.50 but you said ₹ 100.

Appa : Yes tharun. The amount ₹ 99.50 is difficult to tell. So I rounded off to ₹ 100. 

Tharun : Appa, why don’t you say ₹ 99 instead of ₹ 100?

Appa : Yes, here the amount is ₹ 99.50. If the amount is more than or equal to 50 paise, round to the nearest value.

Tharun : Appa, Suppose if the amount is less than 50 paise, then keep the value as it is leaving the 50 paise?

Appa : Yes Tharun, you are correct. (They bought, footwear and went happily) 

To measure the money accurately, we can use the approximation

The approximate value of ₹ 1 is the whole number of before or after.

Let us try

 Estimate the following rupees (before or after) using the multiples of ₹ 10.

Deepak bought groundnut cookies for ₹ 24.40, Dhal mixture for ₹ 34.60 and murukku for ₹ 28.75. He prepared to estimate the value to the nearest rupees.